Elster Instromet RVG Mode D'emploi page 14

– Re-close all oil filler necks (seal using O-rings).
– The time interval for checking the oil level depends on the individual operating conditions
and gas qualities. Generally, check the oil level every 2 months.
If the operator's experience shows otherwise, then the inspection intervals can be
extended. In the case of operation with natural gas, the oil should generally be changed
every 5 years, or earlier in the case of contamination.
Instructions for checking oil:
– During operation the oil is distributed in the meter, which means that under certain
circumstances no oil is visible in the gauge glass. The oil level must therefore be checked
once the meter has been idle for approx. 5 minutes. To refill it, the meter must be
depressurised.
– Never transport a rotary gas meter containing oil. Make sure that the oil is drained out
before transporting the meter (e.g. when sending the meter for repairs), otherwise the oil
will penetrate the measuring chamber and damage the meter.
Flow
(vertical)
from bottom to top
E = Oil filler neck
Figure 6: Permitted operating positions, oil filling and oil-level display for Type RVG
Flow direction
G16 – G100
Horizontal Approx. 100 ml
Vertical Approx. 225 ml
Table 3: Guide values for oil quantity on commissioning and for oil changes for Type RVG
© Elster GmbH · All rights reserved · Subject to technical modification
Flow
(horizontal)
from left to right
O = Oil-level gauge glass
RVG with GGG 40 housing
G160 – G250
Approx. 240 ml
Approx. 525 ml
Flow
(vertical)
from top to bottom
A = Oil drain sleeve
Oil quantity
RVG with aluminium housing
G16 – G100
Approx. 65 ml
Approx. 170 ml
Elster-Instromet
Flow
(horizontal)
from right to left
G160 – G400
Approx. 190 ml
Approx. 535 ml
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